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E. A. HAYT.-

Apparatus forRefrigerating Rooms. 4

No. 235,870. Patented Dec. 28, I880;

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UNITED STATES PATENT ()FFIC'E EZRA A. HAYT, OF PATTERSON, NEW YORK.

APPARATUS FOR REFRIGERATING ROOMS.

SPECIFICATION forming part of Letters Patent No. 235,870, dated December28, 1880.

ApplicatiOn filed November 23, 1880.

vented a new and useful Improvement in Apparatus for RefrigeratingRooms, of which the following is a full, true, and exact description,reference being had to the accompanying drawings.

In the use of machines for obtaining by the compression and expansion ofgases or vapors low temperatures in rooms, it is a matter of importanceto avoid the leakage or escape of the gases or vapors contained withinthe refrigerating apparatus into the rooms to be cooled. This isespecially true where such vapors as ammonia, sulphurous acid, orsimilar corrosive bodies are employed. One of the difficulties in thepractical operation of re. frigerating apparatus so constructed has beenthat the pipes placed within the rooms desired to be cooled have beenliable to allow the escape of the contained vapors under pressure attheir connectingjoints.

My invention is designed to prevent the possibility of any escape of thecontained vapors or gases within the apartment which it is desired torefrigerate. This I do by placmg within the apartment to be refrigerateda series of returning-pipes, so arranged as to present no joint or placeof possible escape within the room. The pipes which I use are,preferably, welded iron pipes, which extend through the apartment to berefrigerated and into the space beyond at both ends of said apartment.Each pipe is connected to the next by a coupling outside of theapartment to be refrigerated, and consequently, if any escape occur, itcan do no damage to the articlcs contained in said apartment. I propose,in practice, to use this method of coupling the refrigerating-pipes inconnection with chambers, cars, and other apartments which it is desiredto refrigerate.

In my drawings, Figure 1 represents an outside perspective view, partlybroken away, of a car provided with my apparatus. Fig. 2 represents themethod of connecting two or more cars in a train so that the gas orvapor may be supplied from one car to the others 1n the train and returnto its place of compression.

In the second figure, 0 represents a supplypipe extending the length ofthe train of cars to be refrigerated. B represents the returningrefrigerating-coil. The pipes 0 should (No model.)

be preferably made of less diameter than the pipes B, so as to allow ofthe expansion of the escaping vapor or gas in such pipes.

In the first figure, A represents, generally,

a car; B, a series of parallel pipes, which should be preferablyarranged in the upper part of the car. They are constructed, as shown inthe drawings, so as to pass through both ends of the car, and each pairof pipes is connected by a coupling outside of the car, so that, infact, a continuous circuit of pipe is made, each pipe being connectedwith the next in couples, one at either end of the car. By this method,as will be readilyseen, all possible danger of injury to the contents ofthe car by escaping vapors or gas is prevented.

My cars may be arranged in trains and connected each with the next byflexible couplings. Said pipes should extend the entire len gthof thetrain, and be connected with the end car of the series, while theexpandingvapor returns through the series of cars. I do not, however,limit myself to this method of connection, as others may be foundadvantageous.

I find it less expensive to carry my welded pipes through the walls ofthe chamber and allow them to project into an external space but acontinuous welded coil without joints could also be used and placedwithin the room, having its supply and delivery pipes extending outsideof the room, but not pro vided with any coupling within the room, andstill carry out the object of my invention.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A refrigerating-chamberin which cold is produced by the expansion ofvapors or gases, provided with a seriesof pipes or tubes extendingbeyond and outside of the walls of said chamber and connected with eachother by connections solely outside of said chamber, for the purpose ofpreventing the escape of injurious gases or vapors within therefrigerating-chamber, substantially as described.

2. A refrigerating-chamber wherein cold is produced. by the expansion ofvapors or gases, provided with a refrigerating-coil without joint orconnection within such chill-room, substantially as described.

EZRA A. HAYT.

Witnesses:

S. F. SULLIVAN, GEo. W. MIATT.

